A New GNB Model of Crash Frequency for Freeway Sharp Horizontal Curve Based on Interactive Influence of Explanatory Variables

Table 1

Sample source and size.

Source	observation period	Freeway length (Km)	Accident
MCGP	2008-2012	2200.779	135498
NSG freeway TPD & FAMC	2008-2012	72.00	1428
GZJC freeway TPD & FAMC	2008-2012	50.74	3115
JZN freeway TPD & FAMC	2006-2012	109.84	11209
GH freeway TPD & FAMC	2008-2012	155.306	3441
KY freeway TPD & FAMC	2008-2012	125.20	2351
GZBH freeway TPD & FAMC	2007-2012	21.652	12850
SM freeway TPD & FAMC	2008-2011	58.361	719